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(No Model.) n 4 Sheets- Sheet l. F. O. HORENZ.

AUTOMATIC DAMPER. No. 445,113. Patented Jan. 20,'1891.

(No Model.) 4 Sheets-Sheet 2.

P. 0. HRENZ.

AUTOMATIC DAMPBR. No. 445,113. Patented Jail. 20, 1891.

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4 Sheets- Sheet 3.

AUTOMATIC DAMPER.

No. 445,113. Patented Jan. 20,1891.

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Patented Jan. 20.,

versus do., Wmo-mum msnmcn'ovl D c STATES PATENT OFFICE.

FRIEDRICH OTTO HRENZ, OF RADEBEUL-DRESDEN, SAXONY, GERMANY.

AUTOMATIC DAM PER.

SPECIFICATION forming part of Letters Patent No. 445,113, dated January20, 1891.

Application filed April 23, 1890. Serial No. 349,202. (No model.)

To al?, whom 15 may concern:

Be it known that I, FRIEDRICH OTTO H- BENZ, a subject of the Emperor ofGermany, residing at RadebeulDresden, in Saxony, Germany, have inventedcertain new and useful Improvements in Apparatus for Regulating andCont-rollin g the Admission of Air to Flues and Passages of Boilers orother like Heating Apparatus, of which the following is a specification.

The regulating apparatus consists in a clockwork, the movement of whicheffects a gradual automatic closing of the draft-dam per during theperiod from one charging to the other. This regulating apparatus iscombined with a controlling device which warns the stoker at the end ofeach combustion period and yields an automatic record both as to the endof each combustion period and when the fireman has again wound up theregulating device.

This invention is represented on the annexed drawings, in which-e Figure1 showsa frontview ofthe clock-work. Fig. 2 illustrates a way oftransmitting the motion from the clock-work to a throttle-valve arrangedin the line. Fig. 3 shows a side view, and Fig. a front view, of theclock-work. Fig. 5 represents the oontrollin g device in a larger scale,and Figs. G to 8 represent various means of transmitting the motion fromthe clockwork to the draft-damper.

A wheel C is iiXed on the axis c of a clockwork, Fig. 1. The latter isdriven by means of the weight F, the string or chain f of which is woundon the drum E of the axle o. (See Fig. 3.) The clockwork may be of anordinary kind, such as is, for example, represented in Figs. 3 and et.

The axis a of the throttle-valve A, Fig. 2, is provided with a doublearmed lever I3. Two chains b and b engage at the ends of said lever. Thechain b is fixed to the wheel C and the chain b is fixed to a segment D,arranged on the side of said wheel C. At the running down of theclock-work the chain o is wound upon the segment D. In this manner thethrottle valve A is gradually closed. By means of the segment D, as willbe easily perceived, the result is attained that the throttle-valveromains closed for a time, even when the clock-work moves farther on. Inthis manner a person may allow the burnt-through fire to remain with thethrottlevalvealmost fully closed for some time before restoking. If theclock work be run down, it is wound up again by means of the handle G,the string or chain g of which is wound on the drum E in anotherdirection than the stringf. By this winding up of the clock-work thechain b is wound up the circumference of the wheel O, and in this mannerthe throttlesvalve is immediately again opened.

In order to be able to easily alter as may be desired the lengths oftime during which the clock -work is running down-that is, the periodfrom one stoking to the otherthe following arrangement is made use of:The main driving-wheel l, Fig. 4, works by means of the wheels 2, 3, 4c,5, and 6 on the escapement-wheel 7. The verge Z2 is movable on itspivot, on which a forked arm 5 or crutchwire hangs downward and is ittedto catch the lower part z of the pendulum. The pendulum consists of thewell-known rod z, forming the lower part, and a rod fn, forming theupper part, connected with it by means of a spring-plate y. The latterrod at is inserted in the sheath IV, and may be fixed at any rcquiredheight by means of the screw 0:. In this way the duration of the swingof the pendulum, and therewith the time for the running down of theclockwork, may be very easily and simply varied. Any stoker can bringthis about by a few simple turns of the handle as soon as a stronger orweaker firing is required.

In order that the stolzer may be notified each time that thethrottle-valve is entirely opened or entirely shut, an arrangement isattached by which an alarm sounds when the clock-work is quite wound upand when, consequently, the throttlevalvc is entirely opened, and bywhich another signal sounds when the clock-work has entirely run down,and consequently the throttle-valve is entirely closed. For this purposetwo pins Z and 71; are Iitted on the drum E, Fig. 5, of which pin actson the arm o on the winding up of the clock-work and pin Zon the arm mon the IOL) running down of thc clock-work. The arm o is attached to theaxle O, on which the arm o2 of the clapper of the bell U is iitted.

If the clock-Work be Wound up by means of the handle G, the pin 7o takesa position behind the arm o and presses the saine back in the directionofthe arrow I, whereby the clapper of the bell U is moved to the left.The pin 7c is arranged on the drum E in such a manner that it slips fromoff the arm o shortly before the Weight F is quite drawn up. The clapperthen strikes on the bell U and gives the lstoker the signal that theclockwork is wound up and the throttle-valve' is quite opened. On therunning down ofthe clock-work, on the other hand, the pin Zcomes intoaction, catches behind the arm m of the M," and pushes the same to theleft,I shown by the arrow I I. The arm on is thereby pressed downwardand works by v ineansfofl'tliearm r, fixed on the cam R, in

- the paper disk.

such a manner on thek shank of the clapper t, movable on shaft 'I of thebell V, that the clapper is moved awayfrom the above-named bell'.A AVhenby. the continued motion of the drum E the pin Z slips away from the armIm, the latter :swings back by reason of the action of a spring seatedon the axle, and the bell V is struck by the cla'pper as a signal thatthe throttlefvalve is closed. In order to prevent a further. revolutionof the drum, a pin 7L, Fig. 3, is provided on the same, whichv comesagainst the projection '1i as soon as the bell has been struck. Y

In order to always keep. an Yexact check on theiire'mainanarrangementisattached'which isset inaction on the striking of Vthe bellsand which' makes corresponding holes on a paperdisk connected with anordinary clock and set in motion by the same.

The/two prickers S" and S2, Fig. 5, are avr-Y ranged one above theother. The pricker S', which works on the winding of the" clock-A wdrk,is set in action in the. following manner: The pricker S is fastened ona sleevel?, vihiCll is loosely movable on the axle lll and is providedwith an arm p. `An arm o', alt-` tached to the axle O, strikes againstthis arm p. It' now bythe winding of the clock-i work the arm o ispushed away by the pin k tothe riglit,the armo raises the arm p of thesleeve I), and the pricker S sticks into The other pricker S2., whichmust stick into the disk: on the running down ofv theclock-work, fixedon the axle N, which is provided with an arm n, projecting forward. A;short arm m2, attached to the axleM, works on this arm n, which arm Im2.onthe slipping avvayot' the pin Z'from` the arm m presses downward; Theaxle N makes then a slight revolving. movementan d the prio-kerSfzsticks into a paper disk.

Of course several of the methods of con-V structing the various parts`can be altered or 5 replaced 'by others.

The clock-workdriven by a weight may be replaced by one driven by aspring. Further, the recording and alarm devices may be actuated inother ways and sound-signals may be replaced by sight Ones.

The connection of the drum C, especially with the throttle-valve A orwith any desired slide, may be altered in numerous ways. In Fig. 6 thisconnection is brought about by a single chain,- which can be partiallyWound on both rollers. In Fig. 7 the axle c and the axle a are eachprovided with an arm, and both arms are connected by a rigid rod. lVhcna chain, which is wound upon the roller C and attached to anv arm of theaxle ct, is used in this case equally with the arrangement de picted inFig. G, counter-weights must be made to work on the throttle-valvesaxles. Finally, as depicted in Fig. S, the clockfwork could be inade toact direct on the throttlevalve.

l. In apparatus for automatically regulat ing the supplyof air to boilerand other fur naces, the combination, with a dampereclosing devicearranged in the iiue oran-passage, of' clock-work mechanism comprising'apendulum Q0 y e, a shea-ve `W,in which the upper part is contained, adat spring @j for connecting the upper part a; with the lower part e,whereby the latter engages with a forked arm o r crutch e', connectedwith the pallet orl anchor of an escapement-wheel, and connections fromthe clock-.work to said closing device, substantially as and for thepurpose Set forth.

2. In an apparatus for the purpose described, the combination of ada1np,er-closing device, a clock-work mechanism, a drum c, operated bysaid mechanisnna segment D on said drum, and a chain b, connecting saidclosing device and` segment and so. arranged as to gradually operatesaid closing device, as set forth.,

3. In combination, in a device. for the purpose' mentioned, the lever B,drum C, segment D thereon, connections b b between said lever anddruinfand segment, as set forth, and clock-work mechanism, for thepurpose set forth. Y

4t. In appa 'atus for automatically regulating the supply of air to.boilers and other fur na'ces, the combination, with a, damper or valveclosing device arranged in theiiue or air-passage, of clockworkmechanism for operating the same anda signaling apparatus.

operated by said clockework and comprising an audible alarm andmechanism, substantially as described, to operate said alarm on therunning down and on the winding 0f the clock-work, 'substantially as.and forthe pur= pose setforth.

5.. In apparatus for automatically regulat-Y ing the supply of air toboiler and other furnace s, the combination, with a damper or valveclosing device arranged in the flue orv air-passage, of clock-workmechanism operat= IIO ing said device and a recording apparatus adaptedto 'record both the terminationof the combustion period herein referredto as well as the reopening of the damper operated by said clock-workand comprising pivoted priokers and levers or arms for turning the same,substantially* as and for the purpose .Set forth.

In witness whereof I have hereunto set my hand in presence of twowitnesses.

WILHELM GRUK, DR. HBERLEIN.

